BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C, SH 56, SH 56 C, SH 86, SH 86 C
English
9
Due to the heat from the catalytic 
reaction, these screens will normally 
stay clean and need no service or 
maintenance. If you experience loss of 
performance and you suspect a clogged 
screen, have your muffler maintained by 
a STIHL servicing dealer.
MAINTENANCE, REPAIR AND 
STORING
Strictly follow the maintenance and 
repair instructions in the appropriate 
section of your instruction manual. 
Please refer to the maintenance chart in 
this manual.
Tighten all nuts, bolts and screws except 
the carburetor adjustment screws after 
each use.
For maintenance items please also refer 
to the maintenance chart in this manual. 
Store the power tool in a dry and high or 
locked location out of reach of children.
Before storing for longer than a few 
days, always empty the fuel tank. See 
chapter "Storing the machine" in this 
manual.
Store fuel in an approved and properly 
labeled safety-type canister only. Take 
care when handling gasoline! For health 
and safety reasons, avoid direct contact 
with the skin and avoid inhaling fuel 
vapor!
Warning!
Use only identical STIHL replacement 
parts for maintenance and repair. Use 
of non-STIHL parts may cause serious 
or fatal injury.
Warning!
Always stop the engine and make sure 
that the fan is stopped before doing any 
maintenance or repair work or cleaning 
the power tool. Do not attempt any 
maintenance or repair work not 
described in your instruction manual. 
Have such work performed by your 
STIHL servicing dealer only.
Warning!
Use the specified spark plug and make 
sure it and the ignition lead are always 
clean and in good condition. Always 
press spark plug boot snugly onto spark 
plug terminal of the proper size. (Note: 
If terminal has detachable SAE adapter 
nut, it must be securely attached.) A 
loose connection between spark plug 
terminal and the ignition wire connector 
in the boot may create arcing that could 
ignite combustible fumes and cause a 
fire.
Warning!
Never test the ignition system with the 
boot removed from the spark plug or 
with a removed spark plug, since 
uncontained sparking may cause a fire.
Warning!
Do not operate your power tool if the 
muffler is damaged, missing or modi-
fied. An improperly maintained muffler 
will increase the risk of fire and hearing 
loss. If your muffler was equipped with 
a spark-arresting screen to reduce the 
risk of fire, never operate your power 
tool if the screen is missing or dam-
aged. Remember that the risk of forest 
fires is greater in hot or dry weather.